Sinks not draining/poor venting?

If you drain galley tank and leave drain valve OPEN does kitchen sink drain ?

Which Air Admittance Valves are you using......cheap $5-$6 black ones from Home Depot/Lowes?

Old-Biscuit wrote:
If you drain galley tank and leave drain valve OPEN does kitchen sink drain ?

Which Air Admittance Valves are you using......cheap $5-$6 black ones from Home Depot/Lowes?

The tank will drain great when it's drain valve is opened, I need to change out the gate valve as it has a drip. The admittance valve I've used was one from Home Depot first, then camping it did it again so I ran down to a rv parts store and got one from there. Is there a better type of valve?

It is possible that your drain line is into the tank too far. When it becomes under water then it would have to put pressure on the tank to drain. This can happen because you are using the drain line for the vent line. If there were a separate line for the vent it could always allow air out of the tank. Draining into a tank is not like draining into an open ended line. The tank that has the outlet closed needs to allow air out, the opened tank needs to allow air in. The automatic vent will only allow air in.

wvcampers wrote:
It is possible that your drain line is into the tank too far. When it becomes under water then it would have to put pressure on the tank to drain. This can happen because you are using the drain line for the vent line. If there were a separate line for the vent it could always allow air out of the tank. Draining into a tank is not like draining into an open ended line. The tank that has the outlet closed needs to allow air out, the opened tank needs to allow air in. The automatic vent will only allow air in.

I wish I didn't have a island sink haha, so are there other valves a guy could use?

buckarooman wrote:

Old-Biscuit wrote:
If you drain galley tank and leave drain valve OPEN does kitchen sink drain ?

Which Air Admittance Valves are you using......cheap $5-$6 black ones from Home Depot/Lowes?

The tank will drain great when it's drain valve is opened, I need to change out the gate valve as it has a drip. The admittance valve I've used was one from Home Depot first, then camping it did it again so I ran down to a rv parts store and got one from there. Is there a better type of valve?

The TANK drains OK when drain valve is open

BUT.......does the KITCHEN SINK drain better when tank drain valve is LEFT OPEN?

(Tank draining OK suggest the air admittance valve is working --- opening----and providing venting for tank draining)

The tank will drain great when it's drain valve is opened, I need to change out the gate valve as it has a drip. The admittance valve I've used was one from Home Depot first, then camping it did it again so I ran down to a rv parts store and got one from there. Is there a better type of valve?
Since no one is telling you GOOGLE "Oatey"
Art.

So here's my thinking, what if I built a short chunk of hose to hook to both drain outlets under the trailer, and kept them level and elevated. Tying the two tanks together one being roof vented one not wouldn't the one that's not beneifet from the one that is?then when I'm ready to leave shut both gates drain what waters left in the hose, or I could put a Y in the middle to be able to drain both tanks at once in the camp ground.

I will ask this just one more time and then I am moving on...........


"If you drain galley tank and leave drain valve OPEN does kitchen sink drain"?

buckarooman wrote:

Old-Biscuit wrote:
If you drain galley tank and leave drain valve OPEN does kitchen sink drain ?

Which Air Admittance Valves are you using......cheap $5-$6 black ones from Home Depot/Lowes?

The tank will drain great when it's drain valve is opened, I need to change out the gate valve as it has a drip. The admittance valve I've used was one from Home Depot first, then camping it did it again so I ran down to a rv parts store and got one from there. Is there a better type of valve?

I already replied about that sorry for the miss communication

Yeah, he is talking about the SINK draining if the valve is open, NOT the tank. You kinda got stuck on the TANK draining.

Tim